Stamps of Czechoslovakia, IGY issue

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postage

1957, Dec 20 IGY issue unwmk
Colnect-4490-064-Radio-telescope-and-observatory.jpgColnect-4490-065-Meteorological-Station-in-High-Tatra.jpgColnect-4490-066-Sputnik-2-over-Earth.jpg
X 30h radio telescope & observatory, p. 11.5x11.25
X 45h Lomnicky Stit Meteorological Station
X 75h Sputnik 2 over Earth, p. 11.5x11.25

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